在iOS中的UITextView或UIWebView中显示JSON(格式良好)的最佳方法

解决方案是从JSON字符串创建JSON对象,

然后使用.PrettyPrinted选项将JSON对象转换回JSON String.

代码是

let jsonString = "[{\"person\": {\"name\":\"Dani\",\"age\":\"24\"}},{\"person\": {\"name\":\"ray\",\"age\":\"70\"}}]"

var error: NSError?

//1. convert String to NSData
let jsonData = jsonString.dataUsingEncoding(NSUTF8StringEncoding)!

//2. convert JSON data to JSON object
let jsonObject:AnyObject = NSJSONserialization.JSONObjectWithData(jsonData,options: nil,error: &error)!

//3. convert BACk to JSON data by setTing .PrettyPrinted option
let prettyJsonData = NSJSONserialization.dataWithJSONObject(jsonObject,options: .PrettyPrinted,error: &error)!

//4. convert NSData BACk to NSString (use NSString init for conveniencE),later you can convert to String.
let prettyPrintedJson = NSString(data: prettyJsonData,encoding: NSUTF8StringEncoding)!

//print the result
println("\(prettyPrintedJson)")

结果将如下所示